CalDAV: Add ability to limit sharing to owner

[georgehrke]

User	Before	After
Owner
Sharee

[georgehrke]

Rebased and squashed

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 31911: failure

mariadb10.4-php7.3

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There were 2 warnings:

1) Test\Files\ViewTest::testRenameFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

2) Test\Files\ViewTest::testCopyFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

--

There was 1 failure:

1) Test\Share20\DefaultShareProviderTest::testDeleteUser with data set #3 (0, 'a', 'b', 'c', 'd', false)
Failed asserting that actual size 0 matches expected size 1.

/drone/src/tests/lib/Share20/DefaultShareProviderTest.php:2255

acceptance-app-files

• tests/acceptance/features/app-files.feature:262

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  Scenario: unmarking a file as favorite causes the file list to be sorted again                          # /drone/src/tests/acceptance/features/app-files.feature:262
    Given I am logged in                                                                                  # LoginPageContext::iAmLoggedIn()
    And I create a new folder named "A name alphabetically lower than welcome.txt"                        # FileListContext::iCreateANewFolderNamed()
    And I see that "A name alphabetically lower than welcome.txt" precedes "welcome.txt" in the file list # FileListContext::iSeeThatPrecedesInTheFileList()
    And I close the details view                                                                          # FilesAppContext::iCloseTheDetailsView()
    And I see that the details view is closed                                                             # FilesAppContext::iSeeThatTheDetailsViewIsClosed()
    And I mark "welcome.txt" as favorite                                                                  # FileListContext::iMarkAsFavorite()
    And I see that "welcome.txt" is marked as favorite                                                    # FileListContext::iSeeThatIsMarkedAsFavorite()
    And I see that "welcome.txt" precedes "A name alphabetically lower than welcome.txt" in the file list # FileListContext::iSeeThatPrecedesInTheFileList()
    When I unmark "welcome.txt" as favorite                                                               # FileListContext::iUnmarkAsFavorite()
    Then I see that "welcome.txt" is not marked as favorite                                               # FileListContext::iSeeThatIsNotMarkedAsFavorite()
      Not favorited state icon for file welcome.txt in file list could not be found after 100 seconds (NoSuchElementException)
    And I see that "A name alphabetically lower than welcome.txt" precedes "welcome.txt" in the file list # FileListContext::iSeeThatPrecedesInTheFileList()

[rullzer]

Didn't test but looks good

[MorrisJobke]

This fixed some psalm warnings: #22287

[georgehrke]

@MorrisJobke @rullzer Would you mind if we backport this? It's only needed on 19

[MorrisJobke]

Fine with me

[rullzer]

/backport to stable19